Pitman connection for cutter-bars.



nu. 668,59l. `Pamnum Feb. 9,1901. J, L. TAYLOR.

PITMAN CONNECTION FOB CUTTER BARS.

(Application led Oct. l2, 1900.)

ma Model.)

' ANI/EN TOR WHA/555155.- OQOJ v C2. f r Afmmey fus we rens co.PHoo-Llmo.. vyAsHlNnrun, n. c.

NiTFD STATES PATENT OFFICE.

JOHN L. TAYLOR, OF BOZEMAN, MONTANA.

PITMAN CONNECTION FOR CUTTER-BARS.

SPECIFICATION forming part of Letters Patent No. 668,591, dated February19, 1901.

Application filed October 12, 1900. Serial No. 32,886. (No model.) v

To all whom, t may concern.-

Be it known that I, JOHN L TAYLOR, a citizen of the United States,residing at Bozeman, in the county of Gallatin and State of Montana,have invented certain new and useful Improvementsin Pitman Connectionsfor Cutter-Bars; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertainsto make and use the same, referencebeing had to the accompanying drawings, and to the letters of referencemarkedV thereon, which form a part of this specification.

This invention relates to certain new and useful improvements inconnections between pitman-bars and the cutter-heads of reciprocatingcutters, such as are used in mowing and harvesting machines.

The invention has for its object the provision of simple and inexpensivemeansfor attaching the pitman-rod to the cutter-head, whereby a yieldingconnection is employed, thus allowing the parts to yield withinprescribed limits in the event of the cutter-bar at any time coming incontact with a hard-or unyielding substance, thus preventing anybreaking of the parts.

To these ends and to such others as the invention may pertain, the sameconsists, further, in the novel construction,combination, and adaptationof parts, as will be hereinafter more fully described and thenspecifically defined inthe appended claim. y

My invention is clearly illustrated in the accompanying drawings, which,with the letters of reference marked thereon, form part indicating thesame parts throughout both views, and in which- Figure 1 is an enlargedView in perspective, showing my invention applied; and Fig. 2 is avertical longitudinal section, upon an enlarged scale, upon the lines 22 of Fig. l.

Reference now being had to the details of the drawings by letter, Adesignates the cutter-head end of a reciprocating cutter-bar. Secured tothe upper face of the said cutterhead is a casing B, and within alongitudinal chamber B', provided within said casing, is a block C,which block when connected with the pitman-bar is adapted to be movedlongitudinally Within said chamber, as will hereinafter appear.Connected at their inner ends with the ends of the block C are coiledsprings D, the opposite ends of which springs are attached to the innerends of the rods E E, which rods are extended through opposite ends ofthe casing, and the ends of the rods extending beyond the ends of thecasing are screw-threaded and are provided with adjusting-nuts F F,whereby the tension of the springs may be adjusted, as will beunderstood. The side of the casing adjacent to the cutting edge of thecutterbar is provided with a longitudinal slot or opening G, and the endof the pitman-bar is secured to the block O by means of a suitable boltor other fastening H, which is connected with the block.

From the foregoing description the use and operation of the device willbe readily understood. It will be seen that the coiled springs withinthe casing may be readily adjusted so as to prevent the moving of thesliding block in the movement of the cutter-bar under normal conditions;but the tension of the spring will permit the parts to yieldsufliciently to prevent the knives or teeth upon the cutterbar frombreaking in the event of unyielding obstructions being encounteredthereby. Each of the springs being provided with a separate andindependent means of adjustment render it possible to quickly and easilyregulate or adjust the tension of either spring independent of the otherone, and this independent adjustment feature I consider to be one of theessential features of the invention. Immediately above the longitudinalcenter of the slot G an opening I is provided for lubricating the block.

Having thus described my invention, what `I claim to be new, and desireto secure by Letters Patent, is-

In combination with a bar, a bottomless boxing resting upon and securedto said bar, a reciprocating block conned within said boxing and restingupon the bar', a laterallyprojecting pitman-engaging pin secured to saidblock and guided in an elongated slot in the boxing, springs connectedto the opposite ends of said block, and means for regulating the tensionof said springs, as set forth.

In testimony whereof I afx my signature in presence of two witnesses.

' JOHN L. TAYLOR.

Witnesses:

H. H. HoLLowAY, EUGENE B. HOFFMAN.

IOO

